Quotes · Quote card
Quotation from Elements, Book I by Euclid
“Things which are equal to the same, or to equals, are equal to each other.”
Elements, Book I, Book I, Axiom i, trans. John Casey
The first of the common notions, used already in Proposition 1 to show that the triangle's three sides are equal.
Citation: "Things which are equal to the same, or to equals, are equal to each other." — Euclid, Elements, Book I, Book I, Axiom i, trans. John Casey. (id euclid-elements-book-i-q3)
Portrait: Euclidi Megaren (Euclide) - Studiolo di Federico da Montefeltro, Justus van Gent / Pedro Berruguete, Public domain.
